I'm going to make a confession: I actually like A Pup Named Scooby Doo better than the original Scooby Doo. I found the original rote and unimaginative, and while A Pup Named Scooby Doo wasn't exactly the greatest cartoon either, it had funky animation and a self-awareness I could really dig. As far as Scrappy Doo, the spunky little scamp many fans believe ruined the Scooby Doo series (I never thought he was that bad), you can read about his origins over on MarkEvanier's site.